// Copyright (c)  YISH. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.

using NSQL.Sharpen;

namespace NSQL.Expressions.Functions
{
    public class MedianFunction : BaseExpression, IMedianFunction
    {
        public AggregateType AggregateType { get; } = AggregateType.None;
        public INumericExpression Expr { get; set; }

        public MedianFunction(INumericExpression expression)
        {
            Expr = expression;
        }
        public override T Accept<T>(IExpressionVisitor<T> visitor) => visitor.Visit(this);

        public override void Accept(IExpressionVisitor visitor) => visitor.Visit(this);

        public override bool IsValid => Expr.IsValid;
        
        protected override IExpression DeepCopy()
        {
            return new MedianFunction(Expr.DeepClone())
            {
                Tag = Tag
            };
        }

    }
}